Binding post for loose-leaf books



Apr. 24,1923, 1,452,360

.W. WILBURGER BINDING POST FOR LOOSE LEAF BOOKS Filed Nov. 14', 1921 mummi Patented Apr. 24, 1923.

WILLIAM WILBURGER, 0F BROOKLYN, NEW YORK.

BINDING POST FOR LOOSE-LEAF BOOKS.

Application md November 14, i921. serial Np. 515,012;

4 To @Hicham t may conce/m:

Be it known that I, VILLIAM VILBURGER,

a citizen of the United States, and residentv of Brooklyn., in the.. county of Kings and State of NewYorlgh'ave invented certain new vand y*useful Improvements in Binding -Posts for Loose-Leaf Books, of which the following is a full, clear, and exact specification.

This invention relates to binding posts for loose leaf books and has for its object to provide a resilient binding post for use with rigid book covers so that said post may expand and contract as the covers of the vbook are spread apart or folded together in opening and closing said book.

A further object is to provide a sectional `binding post of this kind, both sections of which are resilient and one section detachably connected to the other. Another ob- :ject is to provide the resilient sections of the binding post with suitable heads fastened thereto in such a manner that they will not be displaced when said sections are expanded or bowed. Other objects will appear as the description proceeds. f

The invention will be first hereinafter described in connection with the accompanying drawings, which constitute part of this specification. and then more specifically defined in the claims at the end of the description.

In the accompanying drawings, wherein similar reference characters are used to designate corresponding parts throughout the several views:

Figure 1 is a section of a book having rigid covers connected by a resilient binding post constructed substantially in accordance with this invention, the book being closed.

Figure 2 is a similar view of the book open, and

Figure 3 is a detailed section of the binding post drawn to a larger scale and showing the means of fastening the heads on the section of said post, as well as the detachable screw connection between said sections.

The. book illustrated in Figures 1 and 2 has stiff covers 1 and 2 connected by flexible hinge portions 4 and 5 to a stiff back mein- `17 through which the binding posts extend.

Each binding post is made in two sections, a larger section 6 ofresilient coiled wire and a smaller section 10 of similar'construction. The larger section 6 has a head preferably made in two parts. part of said head has a tubular portion lor sleeve 7 fitting around a plurality of coils of the wire forming said larger section of the shank of the post, and an outwardly turned annular fiange 18, while the outer part 8 is preferably made dome-shaped a-nd has an inwardly turned peripheral flange 19 engaging the flange 18 of the inner part. The inner end ofthe sleeve 7 is bent inwardly or crimped at 14E between adjacent coils of the section 6, whereby the head is rigidly connected to said section. A head similarly formed with a sleeve 11 and domeshaped member 12 is connected to the inner section 10 of the shank of the post in the same manner as just described in connection with the head on the outer section 6 of said shank. Said outer section 6 is preferably rnade longer than the inner section 10 so as to extend substantially through the book, as illustrated in Figure 1.

In assembling the book the outer sections `6 of the binding posts are inserted from one tions 13 in the cover 1 and screwed into the free ends of the Lsections 6, see Figs. 1 and 3. The inner sections 10 of the Shanks ot' the binding posts are vmade long enough to extend for some distance into thev outer sections, as indicated at 15 in Figs. 2 and 3, so that said sectionsvwill hold together under the strain of expansion when the book is opened. As shown in Fig. 2, the opening of the book stretchesor expands the resilient coils of which the shanks of the binding posts are made without separating the engaging portions 15 of the sections of said shanks. IVhen the book is opened the binding posts are bowed or arched, as well as expanded, so that the leaves 16 may lie substantially flat and be conveniently turned,

The inner As soon as the book is closed and the strain4 is removed from the shanks of the binding posts they contract to their original form, as shown in Figs. l and 3.

I claim:

1. A binding post for loose leaf books having its shank composed of two sections of coiled resilient wire, one section having screw connection with the other.

2. A binding post for loose leaf books having its shank formed of coiled Wire, and a head itted over the end of Said shank and secured in place by having portions thereof bent inward between adjacent coils of the wire.

3. A binding post for loose leaf books having its shank composed of two sections of coiled resilient wire, one section having screw connection With the other, and the outer section extending substantially through the book.

4. A binding post for loose leaf books having its shank composed of tWo sections of coiled resilient wire, one section having screw connection with the other, and both sections having heads secured to their outer ends.

In testimony whereof I have signed my name to this sqoeciication.v

WILLIAM WILBURGER. 

